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Rate matching method and device

A rate matching and bit rate technology, applied in the field of rate matching, can solve problems such as performance loss

Active Publication Date: 2017-11-10
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the situation where there are many information bits in the mother code, the rate matching method of directly punching / shortening the mother code will cause performance loss

Method used

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  • Rate matching method and device

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Embodiment Construction

[0026] The specific embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0027] figure 1 It is the basic process of wireless communication. At the sending end, the source is sent out after sequentially undergoing source coding, channel coding, rate matching and modulation mapping. At the receiving end, the destination is output through demapping and demodulation, derate matching, channel decoding and source decoding in sequence. Polar codes can be used for channel coding and decoding. Since the code length of the original Polar code (mother code) is an integer power of 2, it is necessary to implement a Polar code with any code length through rate matching in practical applications. The sending end performs rate matching after channel encoding to achieve any target code length, and at the receiving end, de-rate matching is performed before channel decoding. It should be noted that the basic process o...

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Abstract

The application discloses a rate matching method. The method comprises the following steps: network equipment determines transmission bit rate R, wherein R is equal to K / M, K relates to the length of an information bit, M relates to the length of a target code, and K and M are positive integers; if the transmission bit rate R is greater than or equal to a first bit rate threshold, the network equipment determines to adopt a shortening mode for a bit sequence of which the length is N, and if the transmission bit rate R is smaller than the first bit rate threshold, the network equipment determines to adopt a punching mode for the bit sequence of which the length is N, N is the length of a mother code and is a positive integer; the network equipment performs Polar coding for the bit sequence of which the length is N by adopting a polar code to obtain a first coded sequence of which the length is N, and the network equipment performs shortening or punching for the first coded sequence to obtain a second coded sequence of which the length is M. The application also provides rate matching equipment corresponding to the method. By adopting the above method and equipment, the punching / shortening mode can be flexibly selected, and the performance loss caused by the punching / shortening process can be overcome.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a rate matching method and device. Background technique [0002] Communication systems usually use channel coding to improve the reliability of data transmission and ensure the quality of communication. The polar codes (Polar codes) proposed by Turkish professor Arikan are the first codes to theoretically prove that they can reach Shannon capacity and have low encoding and decoding complexity. Polar code is a linear block code whose coding matrix is ​​G N , the encoding process is in Is a binary row vector with a length of N (that is, the mother code length); G N is an N×N matrix, and defined as log 2 N matrix F 2 The Kronecker product of . the above matrix [0003] During the encoding process of Polar code, Some of the bits in are used to carry information, called information bits, and the index set of these bits is denoted as The other part of t...

Claims

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Application Information

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IPC IPC(8): H04L1/00
CPCH04L1/0013H04L1/0068H04L1/0057H04L1/0071H04W28/04
Inventor 张公正皇甫幼睿黄凌晨陈莹乔云飞李榕
Owner HUAWEI TECH CO LTD
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